Right,it's sleeping car. I just add the photo to show it. Paste picture in topic is freaking me out, it's hard control and alway lost picture, I don't know why.
Thank you for your comment. I really don't know how much price is suitable, because It's my first time to sell my design at internet. I modify the price to $15, maybe it's ok. Lego is only my hobby but not job, I don't want make money from it. But in China, Lego isn't popular because it's expensive for our average incoming, especially buy parts to make my own design, so I only intend to sell my work to support my continuous design.